19149123354901 has 2 divisors, whose sum is σ = 19149123354902. Its totient is φ = 19149123354900.

The previous prime is 19149123354899. The next prime is 19149123354917. The reversal of 19149123354901 is 10945332194191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17051333214276 + 2097790140625 = 4129326^2 + 1448375^2 .

It is an emirp because it is prime and its reverse (10945332194191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19149123354901 - 2¹ = 19149123354899 is a prime.

It is a super-2 number, since 2×19149123354901² (a number of 27 digits) contains 22 as substring.

Together with 19149123354899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19149123354301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9574561677450 + 9574561677451.

It is an arithmetic number, because the mean of its divisors is an integer number (9574561677451).

Almost surely, 2^{19149123354901} is an apocalyptic number.

It is an amenable number.

19149123354901 is a deficient number, since it is larger than the sum of its proper divisors (1).

19149123354901 is an equidigital number, since it uses as much as digits as its factorization.

19149123354901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 19149123354901 in words is "nineteen trillion, one hundred forty-nine billion, one hundred twenty-three million, three hundred fifty-four thousand, nine hundred one".